Determine whether polygons found in a PolySet are self-intersecting.
isIntersecting (polys, numericResult = FALSE)
PolySet to use.
Boolean value; if
numericResult = TRUE, this function counts intersections
as the algorithm processes them. It counts certain types (i.e., those
involving vertices and those where an edge retraces over an edge) more
The function does not give special consideration to holes. It returns
a value for each unique (
SID), regardless of
whether a contour represents a hole.
PolyData with columns
SID (may be missing),
intersecting contains the number of intersections. Otherwise,
it contains a Boolean value.
Nicholas M. Boers, Associate Professor – Computer Science
MacEwan University, Edmonton AB
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